## Thinking Path
> - Paperclip orchestrates AI agents for zero-human companies
> - The issue thread is the operator's durable audit trail for what
changed and why
> - Workspace changes and stale disposition notices need to be visible
in that same timeline without noisy or misleading rendering
> - The local branch already contained backend activity details,
timeline conversion, and UI rendering work for those events
> - This pull request isolates the issue-thread activity work into a
standalone branch against `origin/master`
> - The benefit is a focused audit-trail PR that can merge independently
of the sidebar/operator UI polish branch
## What Changed
- Adds readable workspace-change activity details to issue update
activity events.
- Surfaces workspace-change events in issue chat/timeline rendering.
- Makes the existing issue comment migration idempotent.
- Folds and renders stale disposition notices inline so they match
activity-log styling and spacing.
- Adds focused route, timeline, and issue-thread system notice coverage.
## Verification
- `pnpm install --frozen-lockfile`
- `pnpm exec vitest run
server/src/__tests__/issue-activity-events-routes.test.ts
ui/src/lib/issue-timeline-events.test.ts
ui/src/components/IssueChatThreadSystemNotice.test.tsx` — 3 files
passed, 22 tests passed.
- Confirmed the PR changes 9 files and does not include `pnpm-lock.yaml`
or `.github/workflows/*`.
- `pnpm exec vitest run
server/src/__tests__/issue-closed-workspace-routes.test.ts` — 1 file
passed, 4 tests passed.
- `pnpm exec vitest run
server/src/__tests__/issue-activity-events-routes.test.ts
ui/src/lib/issue-timeline-events.test.ts
ui/src/components/IssueChatThreadSystemNotice.test.tsx
server/src/services/recovery/successful-run-handoff.test.ts
packages/shared/src/validators/issue.test.ts` — 5 files passed, 54 tests
passed.
- `pnpm --filter @paperclipai/shared typecheck && pnpm --filter
@paperclipai/server typecheck && pnpm --filter @paperclipai/ui
typecheck`.
- `pnpm --filter @paperclipai/ui typecheck` after adding the Storybook
screenshot fixture.
- Captured Storybook screenshots for the new UI rendering paths:
- Collapsed stale notice + workspace-change row:
`docs/pr-screenshots/pr-5356/issue-thread-notices-collapsed.png`
- Expanded stale notice details:
`docs/pr-screenshots/pr-5356/issue-thread-notices-expanded.png`
### Screenshots
Collapsed stale notice with workspace-change row:
Expanded stale notice details:
## Risks
- Moderate risk: this touches issue activity serialization and
issue-thread rendering, both of which are central operator surfaces.
- Migration risk is low: the only migration change makes an existing
migration idempotent.
- No new migrations are introduced, so there is no cross-PR migration
ordering requirement.
> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.
## Model Used
- OpenAI Codex, GPT-5 coding agent, shell/tool-use enabled, used to
split the existing branch, verify the isolated PR branch, and create
this PR.
## Checklist
- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge
---------
Co-authored-by: Paperclip <noreply@paperclip.ing>
Dotta
d0e9cc76f2